This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

The stone-covered graves lie within the ruins of an Old West ghost town.

Florida’s half-sized replica of the Vietnam Veterans Wall.

This now-deactivated naval base defended the Florida coast for centuries.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

France's most famous cemetery, with some of its most curious tombs.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The second largest roadrunner in the world stands 11 feet tall in his West Texas town.

A local landmark with generations of spraypainted messages, and more being added each day.

The country music legend's grave is surrounded by Astroturf because fans kept plucking out the grass.